Dynamic Arm Exchange Facilitates Crystallization and Jamming of Starlike Polymers by Spontaneous Fine-Tuning of the Number of Arms - Le Mans Université Accéder directement au contenu
Article Dans Une Revue Physical Review Letters Année : 2013

Dynamic Arm Exchange Facilitates Crystallization and Jamming of Starlike Polymers by Spontaneous Fine-Tuning of the Number of Arms

Résumé

The effect of dynamic arm exchange on the crystallization and the jamming of multiarm starlike polymers was studied using small angle x-ray scattering and rheology. Poly(ethylene oxide) end capped with a small hydrophobic chain formed spherical micelles in water. Dynamic arm exchange allowed rapid crystallization and caused a discontinuous liquid-solid transition in dense suspensions after cooling. It is shown here that this is caused by spontaneous fine-tuning of the number of arms per micelle (f). Elimination of arm exchange by in situ photo-cross-linking of the core did not influence the behavior when f was at the optimum value. However, suboptimal values of f inhibited crystallization and the liquid-solid transition.
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hal-02541532 , version 1 (14-04-2020)

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Fanny Puaud, Taco Nicolai, Erwan Nicol, Lazhar Benyahia, Guillaume Brotons. Dynamic Arm Exchange Facilitates Crystallization and Jamming of Starlike Polymers by Spontaneous Fine-Tuning of the Number of Arms. Physical Review Letters, 2013, 110 (2), pp.028302. ⟨10.1103/PhysRevLett.110.028302⟩. ⟨hal-02541532⟩
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